Story
Negizawa Kamo once tearfully promised his weak childhood friend Kagyuu Juubei that he would grow up to be a teacher who would not stand for bullying. Several years later, as a teacher, he meets Kagyu once more under... strange circumstances to say the least. While Negizawa was training to become a great teacher, Kagyuu (who, like most women, fell for Negizawa) polished her fists so that she could protect him when they met again.
Synopsis via AniList (English).
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